In 1942. the Swedish national aero club KSAK announced a design competition for a suitable beginners model. It should be easy to build and trim, and made from material available in Sweden (i.e. no balsa). The winner was this glider by Börje Stark, which got the name KSAK-1 and was produced as a kit by the H. Vilén company. Although an all sheet model (the sheets were limewood), it was no mean performer. On a testflight at Bromma airport, the prototype got into a thermal and clocked 22 minutes before it flew out of sight! This was longer than the S1 category record, but as the rules stipulated that records could only be set during competitions, the record was never formally recognized.
Arne Andersson produced a reproduction kit in the 1980:s.
| Name: KSAK-1 | Alternative name: |
| Plan-ID (S-O L. numbering): B-196 | Owner: SMOS |
| Designer: Börje Stark | Drawn by: |
| Year designed: 1942 | Wingspan (mm): 700 |
| Category: Klass S1 | |
| Sources: Vilén, Oldtimer 2/1979, AoH 8/1985 | |
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Changed date: 2014-10-05
